Our Kelpie (Australian Collie x dingo) will manage 30km+ rides, but they need to be carefully planned… short road sections(if any), taking it steady down hill, avoiding areas during lambing (she will run by the bike on a lead, but it is a pain riding one handed on anything rough) etc.
She is also left at home from 8am to 6pm. It isn’t ideal, but can be managed. She has a run and kennel outside which she is left in during the day, she is left with sticks / branches to chew and drag around, half her food in a bowl – the other half hidden in toys or in the grass, toys (which are rotated on a daily basis). In addition I try to take her to work with me when possible (twice a week), and the MIL is at our house for two half days… so in reality she is only alone two or three days. You can also find ‘doggy daycare’ centres which (near us) charge £10 a day to let them run around with other dogs in a large outdoor enclosure.
However it is a commitment. She gets two x 45min – 1 hour walks a day, which we vary from walking, frisbee throwing and bike running, she then gets another 20min late eve walk. We do dog training twice a week (to keep her thinking) and one of these sessions includes some agility. I don’t feel that it is fair to leave her alone in the evening or at weekends if she is alone during the week, so nights out or at the cinema during the week are out.
However we have an amazing dog, full of energy, fun and character. She is clever enough to work escape routes out for herself – not great in the garden, but a godsend when out on the bike. She is great with my OH’s kids – 9 and 7, as soft as a soft thing with any children, although she can equally play rough with the adults.
It is possible to have a great trail dog as a pet, but it does take some time and patience.